Stiffening framework grass planting slope protection system and construction method

Abstract

The invention relates to the technical field of side slope protection, in particular to a stiffening framework grass planting slope protection system which comprises a slope surface supporting framework, slope surface supporting stiffening rods and slope surface grass planting covering soil, and the slope surface supporting framework and the slope surface supporting stiffening rods are made of geopolymer materials in a pouring mode; a plurality of slope surface grass planting soil covering areas are arranged in the slope surface supporting framework, slope surface supporting stiffening rods and slope surface grass planting soil covering the slope surface supporting stiffening rods are laid in the slope surface grass planting soil covering areas, the slope surface supporting stiffening rods are of T-shaped structures, and the slope surface grass planting soil is formed by mixing soil, natural fibers and grass seeds. The slope grass planting and soil covering area soil body sliding accumulation caused by rain wash can be effectively prevented, the top soil body disengagement and slope supporting framework deformation of the slope grass planting and soil covering area are avoided, the soil fixation and slope protection effect is improved, the problems of planting soil loss, incomplete root development, plant withering and the like of a traditional framework slope protection under rain wash are solved, and the slope protection effect is improved. Repeated maintenance is avoided, and the full-life-cycle low-cost effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of slope protection, and in particular to the field of skeleton grass-planting slope protection. Background Art

[0002] Skeleton grass slope protection refers to the use of mortar-laid stone or concrete to form a skeleton on the slope surface, and fill the skeleton with turf, spray-seed grass, plant seedlings, etc. to form a surface protection slope protection form. Because the slope surface forms a framework, it can not only effectively fix the steep slope and reduce the scouring of the slope by surface runoff, but also strengthen the slope through plant planting, enhance the landscape effect and ecological function. It has become a common ecological slope protection technology at present. It is widely used in highway and railway roadbed slope engineering, river construction and river bank stabilization and protection engineering, as well as reservoir and lake embankment engineering. Especially in river construction engineering, arch-shaped, gate-shaped, herringbone-shaped and other skeleton slope protection figures can often be seen.

[0003] Existing research results on framework grass planting slope protection are mostly focused on reinforcing the framework. For example, Chinese patent CN117286895A discloses an arch-shaped corrugated steel slope protection structure, which is a continuous arch-shaped corrugated steel slope protection structure formed by interconnecting multiple arch-shaped corrugated steel plates or connecting them through corrugated steel plates as connectors; for example, Chinese patent CN221276642U discloses an arch-shaped framework for slope protection turf, and a tooth surface is fixedly arranged on the back of the arch-shaped framework to facilitate the arch-shaped framework to be fastened to the slope surface; such frameworks still have the following problems: the soil in the slope grass planting covering area is subjected to long-term erosion by heavy rain, and the soil will be hollowed out, destroyed, and even landslides will occur, affecting traffic safety; under the erosion of heavy rain, the rooted soil is lost, and the root system of the frame plant fails to fully develop, causing the plant to dry up, which greatly damages the overall aesthetics of the slope protection.

[0004] There are currently no reports on how to solve the problems of hollowing out, destruction, root soil loss, plant exhaustion, etc. of skeleton grass slope protection under heavy rain erosion, how to improve its ability to resist rain erosion, enhance stability and durability, and ensure the overall aesthetics of the slope protection. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a reinforced frame grass planting slope protection system which can effectively prevent the top soil of the slope grass covering area from being hollowed out, the slope support frame from being deformed, and the soil and water loss from being prevented, and provides a convenient construction method for quickly building the system.

[0006] On the one hand, the present invention provides a stiffened frame grass-planting slope protection system, comprising a slope support frame, characterized in that: a plurality of slope grass-planting covering areas are arranged in the slope support frame, slope support stiffening rods and slope grass-planting covering covering the slope support stiffening rods are laid in the slope grass-planting covering areas, the slope support stiffening rods are of T-shaped structure, and the slope grass-planting covering is made of a mixture of soil, natural fiber and grass seeds.

[0007] Laying slope support stiffeners can effectively prevent soil sliding and accumulation in the grass-covered area of ​​the slope caused by rain erosion, thereby avoiding the soil on the top of the grass-covered area of ​​the slope from falling off and the deformation of the slope support skeleton, improving the soil consolidation and slope protection effect of the stiffened skeleton grass-covered slope protection system, and alleviating the problems of root soil loss, incomplete root development, and plant withering in traditional skeleton slope protection under rain erosion, avoiding repeated maintenance, and achieving a low-cost effect throughout the life cycle.

[0008] As an improvement of the stiffened frame grass-planted slope protection system of the present invention, the top cross bar of the slope surface supporting stiffening rod is arranged horizontally, which further improves the soil consolidation and slope protection effect of the stiffened frame grass-planted slope protection system.

[0009] As an improvement of a stiffening frame grass planting slope protection system of the present invention, the slope support stiffening rods have multiple groups. In two adjacent groups of slope support stiffening rods, the middle longitudinal rods of the upper slope support stiffening rods are abutted against the top cross rods of the lower slope support stiffening rods, and the middle longitudinal rods of the bottom support stiffening rods are abutted against the inner side of the lower edge of the slope support frame, which can prevent the slope support stiffening rods from sliding down and further improve the soil consolidation and slope protection effect of the stiffening frame grass planting slope protection system.

[0010] As an improvement of a stiffened frame grass planting slope protection system of the present invention, a "T"-shaped groove is opened in the grass planting covering area of ​​the slope, and the slope support stiffening rod is arranged in the "T"-shaped groove, so that the slope support stiffening rod is installed more firmly and provides a better slope protection effect.

[0011] As an improvement of the stiffened frame grass-planting slope protection system of the present invention, the slope support frame and the slope support stiffening rod are cast by geopolymer materials; a protrusion is set on the edge of the upper surface of the slope support frame to form a water collection trough edge around the slope grass-planting covering area. The structure cast by geopolymer material has high flexural strength and compressive strength not lower than the structure cast by traditional C25 concrete, and has the advantages of high strength and low cost; the water collection trough edge can quickly collect rainwater flowing down from the slope support frame, avoid rainwater from forming runoff in the slope grass-planting covering area, and protect the integrity of vegetation and soil structure in the slope grass-planting covering area.

[0012] As an improvement of a stiffening frame grass planting slope protection system of the present invention, bamboo is provided inside the top cross bar and the middle longitudinal bar of the slope support stiffening rod. Bamboo is easy to obtain and low in cost. As a stiffening material, it can effectively improve the bending strength of the slope support stiffening rod.

[0013] On the other hand, the present invention also provides a construction method for a stiffened frame grass-planting slope protection system, comprising the following steps: casting a slope support frame; prefabricating slope support stiffening rods; excavating a "T"-shaped groove on the slope in the slope grass-planting covering area, and installing the slope support stiffening rods in the "T"-shaped groove in sequence to form a slope support stiffening system within the frame; mixing natural fibers and grass seeds into the soil to evenly form a slope grass-planting covering, and filling the slope grass-planting covering in the slope support frame.

[0014] The construction method of prefabricated slope support stiffeners and installation in "T"-shaped grooves excavated on site avoids the on-site pouring process and significantly saves construction time and costs.

[0015] As an improvement to the construction method of the stiffening frame grass-planting slope protection system of the present invention, when prefabricating the slope support stiffening rod, bamboo is placed in the center of the mold before pouring.

[0016] As an improvement on the construction method of a reinforced skeleton grass slope protection system of the present invention, the natural fiber is one or more of straw fiber, cotton straw fiber, coconut shell fiber, and palm fiber; the grass seed is one or more of bermudagrass, ryegrass, and tall fescue. The natural fiber reinforces the grass seed growth soil within the skeleton of the traditional skeleton slope protection, enhances the shear strength and rain erosion resistance of the soil, and the degraded organic matter can also promote plant growth and accelerate the formation of a plant protection layer in the grass planting covering area of ​​the slope, thereby further enhancing the soil fixing and slope protection effect inside the traditional skeleton, and alleviating the problems of root soil loss, incomplete root system development, and plant withering in the traditional skeleton slope protection under rain erosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the plan structure of the stiffened frame grass planting slope protection system according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of a prefabricated slope support stiffener according to an embodiment of the present invention.

[0020] In the figure: 1. Slope support stiffeners; 2. Slope grass and soil covering; 3. Arched water collection trough edge; 4. Slope support frame; 5. Bamboo. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Unless specifically stated otherwise, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as restriction. Therefore, other examples of exemplary embodiments can have different values.

[0023] Example 1: Figure 1 As shown, this embodiment proposes a stiffened frame grass planting slope protection system, including a slope support frame 4 and a plurality of slope grass planting soil covering areas arranged in the slope support frame 4. This embodiment adopts an arched slope grass planting soil covering area with a width of 3.6m and a depth of 0.5m, arranged in a matrix, and the spacing between each slope grass planting soil covering area is 0.6m; the slope grass planting soil covering area is paved with a slope support stiffening rod 1 and a slope grass planting soil covering 2 covering the slope support stiffening rod 1, and the slope support stiffening rod 1 is laid at a position close to the top of the slope grass planting soil covering area, and the slope grass planting soil covering 2 is made of a mixture of soil, natural fiber and grass seeds. The shape of the slope grass planting soil covering area set in the slope support frame 4 is not limited to an arch, and can also be set in a gate shape, a herringbone shape, etc.

[0024] In some embodiments, the top cross bar of the slope support stiffener 1 is set horizontally or inclined, but the horizontal setting has a better supporting effect. The beneficial effect of these embodiments is to further enhance the soil consolidation and slope protection effect of the stiffened skeleton grass planting slope protection system.

[0025] In some embodiments, the slope support stiffeners 1 have multiple groups. In two adjacent groups of slope support stiffeners 1, the middle longitudinal rod of the upper slope support stiffeners 1 abuts against the top crossbar of the lower slope support stiffeners 1. When there are multiple rows of slope support stiffeners 1, the top crossbars of the adjacent slope support stiffeners 1 abut against each other, and the middle longitudinal rod of the bottom support stiffener 1 abuts against the inner side of the lower edge of the slope support skeleton 4. The number of slope support stiffeners 1 is adjusted according to the size of the slope grass planting and covering area inside the slope support skeleton 4, and the top crossbar of the slope support stiffener 1 should not be too long. The middle longitudinal rod of the bottom support stiffener 1 abuts against the inner side of the lower edge of the slope support skeleton 4 to prevent the slope support stiffener 1 from sliding down. The combination of multiple groups of slope support stiffeners 1 can provide better support effect and further improve the slope protection effect.

[0026] In some embodiments, a "T"-shaped groove is opened in the grass-planting and soil-covering area of ​​the slope, and the slope support stiffening rod 1 is arranged in the "T"-shaped groove. Alternatively, the slope support stiffening rod 1 can be directly placed in the grass-planting and soil-covering area of ​​the slope without digging a groove and then covered with soil, but the grooved installation method is more secure. The beneficial effect of these embodiments is that the slope support stiffening rod 1 is installed more firmly, providing a better slope protection effect.

[0027] In some embodiments, the slope support skeleton 4 and the slope support stiffener 1 are both cast from geopolymer materials; a protrusion is set on the edge of the upper surface of the slope support skeleton 4 to form an arched water collection trough edge 3 around the grass-planted and covered area of ​​the slope. Preferably, the geopolymer material includes slag, fly ash, soil and natural fibers; the natural fibers can be selected from organic fibers such as straw, cotton stalks, coconut shells, and palm. The beneficial effects of these embodiments are: the structure cast from geopolymer materials has high flexural strength and compressive strength not lower than that of the structure cast from traditional C25 concrete, and has the advantages of high strength and low cost; the arched water collection trough edge 3 can quickly collect rainwater flowing down from the slope support skeleton, avoid rainwater from forming runoff in the grass-planted and covered area of ​​the slope, and protect the integrity of the vegetation and soil structure in the grass-planted and covered area of ​​the slope.

[0028] In some embodiments, bamboo 5 is provided inside the top cross bar and the middle longitudinal bar of the slope support stiffener 1, and the bamboo 5 is made of a whole bamboo instead of bamboo material. The beneficial effect of these embodiments is that the bamboo 5 is easy to obtain and low in cost, and as a stiffening material, it can effectively improve the bending strength of the slope support stiffener 1.

[0029] Embodiment 2: This embodiment proposes a construction method for implementing the stiffened frame grass-planting slope protection system described in Embodiment 1, comprising the following steps: The slope is repaired to ensure that its surface is smooth and stable. A rectangular groove with a depth of 0.5m and a width of 0.8m is excavated at the foot of the slope. Only the rectangular groove needs to be excavated at the foot of the slope, and arched grooves with a depth of 0.5m and a width of 3.6m are excavated from the foot of the slope upward. The distance between the two arched grooves is 0.6m. The mold is placed, and the slope support skeleton 4 is cast. It is vibrated and compacted and maintained in time; preferably, a protrusion can be set on the edge of the upper surface of the slope support skeleton 4 while casting the skeleton, forming an arched water collection trough edge 3 around the grass-planting and covering area of ​​the slope.

[0030] Cast in a rectangular prefabricated rod mold with a length, width and height of 1.20×0.25×0.25 m respectively, remove the mold after curing for 28 days, and obtain a rectangular rod, which is used as the top cross bar or middle longitudinal bar of the slope support stiffening rod 1; or directly cast a "T"-shaped rod as the slope support stiffening rod 1; A "T"-shaped groove is excavated on the slope surface in the grass-planting and covering area of ​​the slope surface, and the slope support stiffening rods are installed in the "T"-shaped grooves in sequence. The number of the slope support stiffening rods 1 and the "T"-shaped grooves is adjusted according to the size, shape and specific needs of the grass-planting and covering area of ​​the slope surface to form a slope support stiffening system within the framework; The soil is mixed with natural fiber and grass seeds to form a slope grass covering soil 2. The soil is selected as a slope protection soil to save costs. The slope grass covering soil 2 is filled in the slope grass covering soil area with a thickness of 1-5 cm. Water is sprayed regularly to keep the soil moist and promote the germination of grass seeds. Straw blankets can also be directly selected, but the cost of straw blankets is relatively high.

[0031] Preferably, the slope support skeleton 4 and the prefabricated slope support stiffener 1 are cast using a geopolymer slurry mixture.

[0032] In some embodiments, when the prefabricated slope supports the stiffening rod 1, Figure 2 As shown, after placing the bamboo in the center of the mold, pouring can be carried out.

[0033] In some embodiments, the natural fiber is one or more of straw fiber, cotton straw fiber, coconut shell fiber, and palm fiber, and the grass species is one or more of bermudagrass, ryegrass, and tall fescue. Bermudagrass, ryegrass, and tall fescue should be selected from grass species with strong adaptability, and other grass species that adapt to local climate and soil conditions can be added at the same time. The beneficial effects of these embodiments are that the natural fiber has a reinforcing effect on the grass seed growth soil within the traditional skeleton slope protection framework, enhances the shear strength and rain erosion resistance of the soil body, and the degraded organic matter can also promote plant growth and accelerate the formation of a plant protective layer in the grass-planting and covering area on the slope, thereby further enhancing the soil consolidation and slope protection effect inside the traditional skeleton, and alleviating the problems of root soil loss, root stunting, and plant wilting in the traditional skeleton slope protection under rain erosion.

Claims

1. A stiffened frame grass planting slope protection system, comprising a slope support frame, characterized in that: The slope support frame is provided with a plurality of slope grass covering areas, in which slope support stiffening rods and slope grass covering covering the slope support stiffening rods are laid, the slope support stiffening rods are T-shaped structures, and the slope grass covering is made of a mixture of soil, natural fibers and grass seeds.

2. The stiffened frame grass-planting slope protection system according to claim 1, characterized in that: The top cross bar of the slope support stiffening rod is arranged horizontally.

3. The stiffened frame grass-planting slope protection system according to claim 2, characterized in that: The slope support stiffening rods are provided in multiple groups. In two adjacent groups of slope support stiffening rods, the middle longitudinal rods of the upper slope support stiffening rods abut against the top cross rods of the lower slope support stiffening rods, and the middle longitudinal rods of the bottom support stiffening rods abut against the inner side of the lower edge of the slope support frame.

4. The stiffened frame grass-planting slope protection system according to claim 3 is characterized in that: A "T"-shaped groove is opened in the grass-planting and soil-covering area of ​​the slope surface, and the slope surface supporting stiffening rod is arranged in the "T"-shaped groove.

5. The stiffened frame grass-planting slope protection system according to claim 1, characterized in that: The slope support frame and the slope support stiffening rod are both cast by geopolymer materials; a protrusion is arranged on the edge of the upper surface of the slope support frame, and a water collecting trough edge is arranged around the grass-planting and soil-covering area of ​​the slope.

6. The stiffened frame grass-planting slope protection system according to claim 1, characterized in that: Bamboo is arranged inside the top cross bar and the middle longitudinal bar of the slope support stiffening rod.

7. A construction method of the stiffened frame grass-planting slope protection system according to claim 1, characterized in that: The following steps are involved: Casting slope support frame; Prefabricated slope support stiffeners; Dig a "T"-shaped groove on the slope surface in the grass-covered area, and install the slope support stiffening rods in the "T"-shaped groove in sequence to form a slope support stiffening system within the framework; The soil is mixed with natural fibers and grass seeds to form a slope grass covering soil, and the slope grass covering soil is filled in the slope support frame.

8. The construction method of the stiffened frame grass-planting slope protection system according to claim 7 is characterized in that: When prefabricating the slope support stiffeners, place the bamboo in the center of the mold before pouring.

9. The construction method of the stiffened frame grass-planting slope protection system according to claim 8, characterized in that: The natural fiber is one or more of straw fiber, cotton straw fiber, coconut shell fiber and palm fiber; the grass species is one or more of bermudagrass, ryegrass and tall fescue.

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